WIKA A2G-65 User manual

Operating instructions

Betriebsanleitung

Mode d'emploi

Manual de instrucciones

Manuale d'uso

GB

Frost protection thermostat model A2G-65

Frostschutzthermostat Typ A2G-65

Thermostat antigel type A2G-65

Termostato antihielo modelo A2G-65

Termostato antigelo modello A2G-65

Frost protection thermostat model A2G-65

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WIKA operating instructions air2guide model A2G-65

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Operating instructions model A2G-65 Page 3-11

Betriebsanleitung Typ A2G-65 Seite 13-21

Mode d'emploi type A2G-65 Page 23-31

Manual de instrucciones modelo A2G-65 Página 33-41

Manuale d'uso modello A2G-65 Pagina 43-51

WIKA

®

is a registered trademark in various countries.

WIKA

®

ist eine geschützte Marke in verschiedenen Ländern.

Prior to starting any work, read the operating instructions!

Keep for later use!

Vor Beginn aller Arbeiten Betriebsanleitung lesen!

Zum späteren Gebrauch aufbewahren!

Lire le mode d‘emploi avant de commencer toute opération !

A conserver pour une utilisation ultérieure !

¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!

¡Guardar el manual para una eventual consulta!

Prima di iniziare ad utilizzare lo strumento, leggere il manuale d‘uso!

Conservare per future consultazioni!

WIKA operating instructions air2guide model A2G-65

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1. General information 4

2. Safety 5

3. Specications 6

4.

Design and function

8

5. Transport, packaging and storage 9

6. Commissioning, operation 9

7. Options and accessories 11

8. Maintenance and cleaning 11

9. Disposal 11

Contents

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1. General information

■

The frost protection thermostat described in the operating instruc-

tions has been designed and manufactured using state-of-the-art

technology. All components are subject to stringent quality and

environmental criteria during production. Our management systems

are certied to ISO 9001 and ISO 14001.

■

These operating instructions contain important information on

handling the instrument. Working safely requires that all safety

instructions and work instructions are observed.

■

Observe the relevant local accident prevention regulations and

general safety regulations for the instrument’s range of use.

■

The operating instructions are part of the product and must be kept

in the immediate vicinity of the instrument and readily accessible to

skilled personnel at any time.

■

Skilled personnel must have carefully read and understood the

operating instructions, prior to beginning any work.

■

The manufacturer’s liability is void in the case of any damage caused

by using the product contrary to its intended use, non-compliance

with these operating instructions, assignment of insuciently

qualied skilled personnel or unauthorised modications to the

instrument.

■

The general terms and conditions contained in the sales

documentation shall apply.

■

Subject to technical modications.

■

Further information:

- Internet address: www.wika.de / www.wika.com

www.air2guide.com

- Relevant data sheet: TE 62.92

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1. General information / 2. Safety

Explanation of symbols

WARNING!

... indicates a potentially dangerous situation which can

result in serious injury or death if not avoided.

Information

… points out useful tips, recommendations and information

for ecient and trouble-free operation.

2. Safety

WARNING!

Before installation, commissioning and operation, ensure

that the appropriate frost protection thermostat has been

selected in terms of measuring range, design and specic

measuring conditions.

Non-observance can result in serious injury and/or damage

to the equipment.

Further important safety instructions can be found in the

individual chapters of these operating instructions.

2.1 Intended use

This frost protection thermostat is used for air-side temperature control

and prevention of frost damage to water heating coils in ventilation and

air-conditioning systems

The instrument has been designed and built solely for the intended use

described here and may only be used accordingly.

The manufacturer shall not be liable for claims of any type based on

operation contrary to the intended use.

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2. Safety / 3. Specications

2.2 Personnel qualication

WARNING!

Risk of injury if qualication is insucient!

Improper handling can result in considerable injury and

damage to equipment.

■

The activities described in these operating instructions

may only be carried out by skilled personnel who have

the qualications described below.

Skilled personnel

Skilled personnel are understood to be personnel who, based on their

technical training, knowledge of measurement and control technology

and on their experience and knowledge of country-specic regulations,

current standards and directives, are capable of carrying out the work

described and independently recognising potential hazards.

Explanation of symbols

CE, Communauté Européenne

Instruments bearing this mark comply with the relevant

European directives.

3. Specications

Capillary tube

Copper alloy

Length 3 m, optional 1.8 or 6 m

Capillary tube lling

R 507

Resetting

automatic, manual optional

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3. Specications

Electrical connection

Screw terminal max. 2.5 mm

2

Cable gland M16 x 1.5

Permissible temperature

Ambient: -30 … +70 °C, max. 85 % rH, non-condensing

Medium: w + minimum 2 K … 70 °C

(w = selected set point)

Housing material

Lower body: PA GK30

Cover: ABS transparent

Dimensions in mm

Ingress protection

IP 65 per EN 60529 / lEC 529

For further specications see WIKA data sheet TE 62.92 and the order

documentation.

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4. Design and function

Description

Design

CE conformity: 2004/108/EG Electromagnetic compatibility (EMC)

Product safety: 2001/95/EC Product safety

EMC: EN 60730-1: 2002

Product safety: EN 60730-1: 2002

Adjustable range for set point

-10 … +15 °C (Factory setting: 5 °C)

Switching dierential

≤ 2 ±1 °C

Repeatability

±0.5 °C

Sensor active length

approx. 60 cm

Switching output

Changeover contact, max. AC 250 V, max. 10 A

Contact material: Ag / Ni (90 % / 10 %), gold-plated (3 µm)

Scope of delivery

Cross-check the scope of delivery with the delivery note.

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5. Transport, packaging and storage

5.1 Transport

Check the frost protection thermostat for any damage that may have

been caused during transportation. Obvious damage must be reported

immediately.

5.2 Packaging

Do not remove packaging until just before mounting.

Keep the packaging as it will provide optimum protection during trans-

port (e.g. change in installation site, sending for repair).

5.3 Storage

Permissible conditions at the place of storage:

Storage temperature: -30 ... +70 °C

Protect frost protection thermostat from moisture and dust.

6. Commissioning, operation

Installation and mechanical connection

The ambient temperature at the frost protection thermostat housing

(with the test loop) must be at least 2 °C above the selected set point.

If this cannot be guaranteed (e.g. outdoors or in exposed areas), the

housing and test loop must be installed inside the air handling unit.

The capillary tube must be mounted on the downstream side of the

heating coil (and on the upstream side in the case of cooling coils).

It should be looped diagonally across the heat exchanger pipes at a

distance of approx. 5 cm and should cover the entire area evenly. For

test purposes, it is recommended to have a loop of approx. 60 cm

directly beneath the housing outside the entry to the duct. To prevent

damage to the capillary tube, a minimum bending radius of 20 mm

must be ensured. Mounting can be made easier by using capillary tube

clamps (optional accessories).

5. Transport, packaging ... / 6. Commissioning, operation

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6. Commissioning, operation

1 - 2 Normal operation

1 - 4 Risk of frost

Connection diagram

The switch in the frost protection thermostat trips when the tempera-

ture over a capillary length of at least 60 cm drops below the selected

set point (contact 1-4 makes). Simultaneously, contact 1-2 breaks

and can be used as a signal contact. An automatic reset (contact 1-2

makes) occurs when the temperature once again exceeds the selected

set point. The air2guide AFT is “intrinsically safe”, i.e. in the event of

any damage to the capillary tube diaphragm system, it automatically

switches to the heating function. Contact 1-4 makes and can thus be

used as an operating contact. The air temperature is measured over the

full length of the sensor (capillary tube).

Commissioning

It is recommended to mount the frost protection thermostat on a special

plate (slide-in module), directly downstream of the heating coil. The

connecting cable must therefore be long enough to enable the plate to

be inserted and removed smoothly. For heating coils with a very large

cross section, several frost protection thermostats can be tted and

connected in series. In such cases, the temperature set point is set

individually for each frost protection thermostat.

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7. Options and accessories ... 9. Disposal

7. Options and accessories

Standard accessories

■

Mounting clamps, 6 pieces for 6 m long capillary tube

■

2 x grommets DA 20/80/10

Options

■

Manual resetting

■

Capillary tube length 1.8 or 6 m

8. Maintenance and cleaning

The frost protection thermostat is maintenance-free and oers long

service life provided it is handled and operated properly.

Clean the instruments with a moist cloth (soap water).

Repairs must only be carried out by the manufacturer or appropriately

qualied skilled personnel.

9. Disposal

Incorrect disposal can put the environment at risk.

Dispose of instrument components and packaging materials in an

environmentally compatible way and in accordance with the country-

specic waste disposal regulations.

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WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Straße 30

63911 Klingenberg • Germany

Tel (+49) 93 72/132-0

Fax (+49) 93 72/132-406

E-Mail inf[email protected]

www.wika.de

WIKA subsidiaries worldwide can be found online at www.wika.com.

WIKA-Niederlassungen weltweit nden Sie online unter www.wika.de.

La liste des liales WIKA dans le monde se trouve sur www.wika.fr.

Sucursales WIKA en todo el mundo puede encontrar en www.wika.es.

Per liali WIKA nel mondo, visitate il nostro sito www.wika.it.

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